Material: Aluminum alloy * Food-grade silicone

Specification: 56*15mm

Thickness: 8mm

Weight: 11g

Instructions for Using the Life-saving whistle

Symbol explanation: ● Short tone (within one second); ■■■ Long sound (more than 3 seconds); The interval between whistles within instructions is 2 to 3 seconds, and the interval between instructions is more than 30 seconds (for example, when sending instructions repeatedly, the interval should be more than 30 seconds). Communication (T) : ■■■ (a long sound) is used for the voice communication of the team to determine the direction of whistles between each other. After receiving the whistle instruction, it is sent to indicate that the instruction has been received (similar to Shouting to feed ~~~~~). Set (U) : ● ● ■■■ (two short and one long) gather in the direction of the whistle (similar to the shout assembly ~~~~) move forward (V) : ● ■■■ (one short and one long) emit during rest to represent the team setting off, emit while moving to represent accelerating forward (similar to the shout rush ~~~~) The front team waits (W) : ● ■■■ ■■■ ■■ (one short and two long) is used when the distance traveled by the team is too long, asking the front team to wait for the back team (similar to Shouting "please wait ~~ wait ~~~~") requesting support S) : ● ● ● (three short) is sent when encountering difficulties and seeking help. The recipient replies with a communication tone (T) indicating that they will go to support (similar to Shouting "urgent!") Urgent! Urgent! Similar) SOS: ● ● ● ■■■ ■■■ ■■■ ■■■ ■ ● ● ● (three short, three long, three short) This is the internationally recognized SOS code. Please remember it well

Use of search and rescue whistles

Three short: Indicates an urgent evacuation.

One long: Indicates the cessation of work. All team members should keep quiet.

One long and one short: indicates to continue the work.

The high-frequency double-tube whistle is a great helper for outdoor equipment. It is small, convenient and easy to carry. The inner cavity is designed without beads and can be used even when water is inside. If you need any color, please contact the customer or leave a message. If no specific color is specified, a random color will be sent.